Global Patent Index - EP 0731266 A1

EP 0731266 A1 19960911 - Controlling exhaust emission from an internal combustion engine

Title (en)

Controlling exhaust emission from an internal combustion engine

Title (de)

Abgasemissionssteuerung einer Brennkraftmaschine

Title (fr)

Commande de limitation d'émissions de gaz d'échappement d'un moteur à combustion interne

Publication

EP 0731266 A1 19960911 (EN)

Application

EP 96301104 A 19960219

Priority

US 40242995 A 19950310

Abstract (en)

The method involves storing a first switch point for use in interpreting an oxygen content of a fuel mixture. A current of the heater element of heated exhaust gas oxygen (HEGO) sensor is sensed to generate a current signal. Further it requires determining whether the current of the heater element is below a first set current threshold based on the value of the current signal. E.g. if the current of the heater element is below the first set current threshold, replacing the first switch point with a second switch point, and controlling the quantity of fuel delivered to the engine by the fuel injector using the second switch point. The second switch point is greater than the first switch point.

IPC 1-7

F02D 41/14

IPC 8 full level

F02D 45/00 (2006.01); F01N 3/24 (2006.01); F02D 41/04 (2006.01); F02D 41/14 (2006.01); F02D 41/22 (2006.01); F02B 1/04 (2006.01)

CPC (source: EP US)

F02D 41/1494 (2013.01 - EP US); F02D 41/1495 (2013.01 - EP US); F02B 1/04 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

US 5505183 A 19960409; DE 69603997 D1 19991007; DE 69603997 T2 19991223; EP 0731266 A1 19960911; EP 0731266 B1 19990901; JP H08296483 A 19961112

DOCDB simple family (application)

US 40242995 A 19950310; DE 69603997 T 19960219; EP 96301104 A 19960219; JP 916096 A 19960123